function readBlockScalar()

in brooklyn-ui/src/main/webapp/assets/js/libs/js-yaml.js [1421:1565]
105 lines of code
35 McCabe index (conditional complexity)

function readBlockScalar(state, nodeIndent) {
  var captureStart,
      folding,
      chomping       = CHOMPING_CLIP,
      detectedIndent = false,
      textIndent     = nodeIndent,
      emptyLines     = 0,
      atMoreIndented = false,
      tmp,
      ch;

  ch = state.input.charCodeAt(state.position);

  if (ch === 0x7C/* | */) {
    folding = false;
  } else if (ch === 0x3E/* > */) {
    folding = true;
  } else {
    return false;
  }

  state.kind = 'scalar';
  state.result = '';

  while (0 !== ch) {
    ch = state.input.charCodeAt(++state.position);

    if (0x2B/* + */ === ch || 0x2D/* - */ === ch) {
      if (CHOMPING_CLIP === chomping) {
        chomping = (0x2B/* + */ === ch) ? CHOMPING_KEEP : CHOMPING_STRIP;
      } else {
        throwError(state, 'repeat of a chomping mode identifier');
      }

    } else if ((tmp = fromDecimalCode(ch)) >= 0) {
      if (tmp === 0) {
        throwError(state, 'bad explicit indentation width of a block scalar; it cannot be less than one');
      } else if (!detectedIndent) {
        textIndent = nodeIndent + tmp - 1;
        detectedIndent = true;
      } else {
        throwError(state, 'repeat of an indentation width identifier');
      }

    } else {
      break;
    }
  }

  if (is_WHITE_SPACE(ch)) {
    do { ch = state.input.charCodeAt(++state.position); }
    while (is_WHITE_SPACE(ch));

    if (0x23/* # */ === ch) {
      do { ch = state.input.charCodeAt(++state.position); }
      while (!is_EOL(ch) && (0 !== ch));
    }
  }

  while (0 !== ch) {
    readLineBreak(state);
    state.lineIndent = 0;

    ch = state.input.charCodeAt(state.position);

    while ((!detectedIndent || state.lineIndent < textIndent) &&
           (0x20/* Space */ === ch)) {
      state.lineIndent++;
      ch = state.input.charCodeAt(++state.position);
    }

    if (!detectedIndent && state.lineIndent > textIndent) {
      textIndent = state.lineIndent;
    }

    if (is_EOL(ch)) {
      emptyLines++;
      continue;
    }

    // End of the scalar.
    if (state.lineIndent < textIndent) {

      // Perform the chomping.
      if (chomping === CHOMPING_KEEP) {
        state.result += common.repeat('\n', emptyLines);
      } else if (chomping === CHOMPING_CLIP) {
        if (detectedIndent) { // i.e. only if the scalar is not empty.
          state.result += '\n';
        }
      }

      // Break this `while` cycle and go to the funciton's epilogue.
      break;
    }

    // Folded style: use fancy rules to handle line breaks.
    if (folding) {

      // Lines starting with white space characters (more-indented lines) are not folded.
      if (is_WHITE_SPACE(ch)) {
        atMoreIndented = true;
        state.result += common.repeat('\n', emptyLines + 1);

      // End of more-indented block.
      } else if (atMoreIndented) {
        atMoreIndented = false;
        state.result += common.repeat('\n', emptyLines + 1);

      // Just one line break - perceive as the same line.
      } else if (0 === emptyLines) {
        if (detectedIndent) { // i.e. only if we have already read some scalar content.
          state.result += ' ';
        }

      // Several line breaks - perceive as different lines.
      } else {
        state.result += common.repeat('\n', emptyLines);
      }

    // Literal style: just add exact number of line breaks between content lines.
    } else {

      // If current line isn't the first one - count line break from the last content line.
      if (detectedIndent) {
        state.result += common.repeat('\n', emptyLines + 1);

      // In case of the first content line - count only empty lines.
      } else {
        state.result += common.repeat('\n', emptyLines);
      }
    }

    detectedIndent = true;
    emptyLines = 0;
    captureStart = state.position;

    while (!is_EOL(ch) && (0 !== ch))
    { ch = state.input.charCodeAt(++state.position); }

    captureSegment(state, captureStart, state.position, false);
  }

  return true;
}